
%0 Journal Article
%A Hay, D 
%A Demunk, P 
%A Mackay, M 
%T Bisphenol Flukicides. V. The Crystal and Molecular Structures of 2,2'-(2,2-Dichlorovinylidene)bis(4-chloro-6-nitrophenol) and 4,4'-(2,2-Dichlorovinylidene)bis(2-chloro-6-nitrophenol)
%J Australian Journal of Chemistry
%D 1981/03/01
%V 34
%N 3
%P 559-567
%K 
%R https://doi.org/10.1071/CH9810559
%U https://www.publish.csiro.au/paper/CH9810559 
%X Crystals of 2,2'-(2,2-dichlorovinylidene)bis(4-chloro-6-nitrophenol) (1), C14H6C14N206, are monoclinic and belong to the space group C2/c with a 17.135(5), b 7.201(2), c 15.406(5) Å, &#946; 118.40(2)º, Z 4. Orthorhombic crystals of the isomeric compound, 4,4'-(2,2-dichlorovinylidene)bis(2-chloro-6-nitrophenol) (2), belong to the space group P bcn with a 20.410(3), b 8.682(2), c 18.716(3) Å, Z 8. The structures were deduced from diffractometer data. For (1), refinement with 956 terms measured with Mo K&#945; radiation converged at R 0.055; structure (2) was refined with 1475 terms measured with Cu K&#945; radiation to R 0.079. Molecule (1) has exact C2 symmetry, and the dihedral angle between the perpendiculars to the plane of the C-C-C bridge and the phenyl rings of 84.2(4)º defines a butterfly conformation. The conformation of (2) is twist with dihedral angles between the perpendiculars to the C-C-C bridge and phenyl rings of 61 .9(7) and 33.0(7)º. 
